Riveting peen extension



Jan. 11, 1944. J. PORTER RIVETING PEEN EXTENSION Filed Aug. 6, 1942 INVENTOR. ESALVIN PORTER 4mm AT NEY' Patented Jan. 11, 1944 7 UNITED STATES PATENT OFFICE 2,338,869 I RIVETING PEEN EXTENSION James A. Porter, Baltimore, Md., assignor to The Glenn L. Martin Company, Middle River, Md.,

a corporation of Maryland I Application August 6, 1942, Serial No. 453,844

(01. rs-4s) 1 Claim.

enced in riveting operations when a rivet had to be headed close to, or beneath, a structural memher, and there was insuflicient space in which to properly line-up the riveting gun with the rivet.

As a general rule, rivets must be squarely hitwhile being headed or the rivet will fail to shear. when there is insuflicient space in which to align the riveting gun with the rivet, it is not possible to heada rivet properly.

Many attempts have been made to build angulairiveting guns for driving relatively inaccessible rivets. Attempts have also been made to design attachments for riveting guns wherein the objects of the present invention could be achieved.

However, none of these attempts have been successiul. Angular attachments for riveting guns have failed because they were not able to transmit efllciently the necessary impact forces in a curved line.

This problem has been solved in the present in-, vention by providing a means whereby the high frequency impacts of a riveting gun can be transmitted around a sharp curve with a minimum loss of force to a rivet set at any angle to the direction of impact of the hammer element of the riveting gun.

Another object of the present invention is to provide an inexpensive, quickly connected and durable attachment for a riveting gun in the nature of a curved. extension for the riveting peen that may be used to head rivets that otherwise could not be reached.

Still another object of the invention is .to provide an attachment for a riveting gun in the nature of a flexible extension for the riveting peen that may be used to head rivets that otherwise could not be reached because of their inaccessibility to the impacting means of the rivetinggun. e

. Further and other object of the invention will.

be hereinafter set forth in the accompanying drawing which shows by way of illustration a preferred embodiment and a modification to-.

gether with the principle thereof, as well as the bst mode ofwhich I am now aware-for applying that principle.

Inthe drawing: r Figure 1 is an elevational view, partiall in section, showing the impact transmitting peen extension attachment connected to a riveting gun.

Figure 2 is a perspective view of a modified retaining clip, connected to the impact transmitting peen extension attachment.

Figure 3 is an elevational view of a modified impact transmitting peen extension attachment connected to a riveting gun.

A riveting gun 6, havin a peen 8 resiliently secured thereto by a spring i0, is shown in Figures 1 and 3. I a

Peen Bis loosely inserted in one end of a tube l2 which is preferably ofcircular cross section. Tube [2 is formed of any suitable material such as metal, or reinforced plastic and the like. Peer. 8 is centered and guided in tube l2 by the bushing l4 which aligns the peen with ball l6. Balls have a diameter substantially equal to the inner diameter of tube 12. They are retained in tube l2 by the bushings l4 and '19 which are inside the tube and at the opposite ends thereof. It will be noted that the balls do not fill the length of tube l2.

Extension peen l8, which is loosely inserted in the opposite end of tube l2 from peen 8, is similar to peen 8. Extension peen i8 is also centered and guided in tube 12 by the bushing l9 so that it is aligned with adjacent ball I6.

Retaining members 24 are secured to tube i2 and are designed to prevent extension peen from falling out of the end of tube H, in which it has been loosely inserted, when the attachment is in a position where the force of gravity could cause it to drop out. The resilient arm are adapted to ride over the rim portion 20 of the peen i8 and hold it in place. However, memhere 24 are sufliciently resilient so that they will not interfere with the impact transmitted from peenB through balls IE to extension peen it when the attachment is being used to head, a

rivet. Members 24 likewise are resilient enough to permit the easy withdrawal of extension peen is from the end of tube i2.

The modified retaining clip 28, which is pivotally'secured at 26 to tube I 2 shown in Figure 2, having the resilient arms 31!, is likewise adapted to prevent extension peen l8 from falling out of the end of tube i2. However, it is designed for a more positive retention of the extension peen II and is provided with a circular flanged head portion 32 for engaging extension peen [8 around rim portion 20. Inside of, and carried by, this head portion 32, is a resilient packing 3! which eting gun, the attachment may be formed to any desired curvature.

Figure 3 shows a modified impact transmitting attachment consisting of a, reinforced flexible tube 36, adapted to retain balls similar to balls I8 shown in Figure 1:

' By means or the flexible reinforced tube shown in the modified form, the curvature of the .tube may be varied. In other respects, the construction and operation is similar to the form shown in Figure 1. A suitable hand grip 34 is provided at one end of tube 38.

In operation, the impact of the peen 8 of a riveting gun which has been inserted in one end An impact transmitting peen extension for riveting guns comprising a tube of constant crosssection, a. plurality of balls substantially filling said tube said balls being substantially of the same diameter as the inside diameter of said tube, and a pair of sleeve members secured in opposite ends of said tube, an impact transmitting peen positively retained in one of said sleeve members, the other of said sleeve members having a hole for the reception of the peen of a riveting gun.

' JAMES A. PORTER. 

